David K. Joyce Minerals

Secondary Minerals, Various Locations

Secondary minerals are thos that form from the decomposition of primary minerals due to the action of water, oxygen and other weathering agents. For example, the upper parts of copper sulphide deposits usually react with oxygen to alter primary copper sulphides into copper oxides, carbonates and sulphates. These latter minerals are secondary minerals. Here are some great examples!

All prices in Canadian dollars. For payment in US$, deduct 19% or multiply by 0.81.

Click on any of the following thumbnails to view a larger image of the specimen.

Malachite, CupriteSecondary Minerals, Various Locations
  • Item #14415
  • Malachite, Cuprite
  • 11.7x7.4x4.8 cm
  • Largest Crystal Size: 3mm
  • $110.00
  • Etoile de Congo Mine
  • Katanga
    Democratic Republic of Congo
  • This specimen is totally covered with sharp, dark green malachite crystals over a core of malachite and deep red cuprite. The cuprite is not visible except where the plate broke away from the rest of the orebody on one end and the underside. Lots of excellent malachite crystals! Displays well.
DioptaseSecondary Minerals, Various Locations
  • Item #17849
  • Dioptase
  • 7.5x5.5x4.1 cm
  • Largest Crystal Size: 0.5mm
  • $40.00
  • Salome
  • Yuma co.
    Arizona, USA
  • The front-top of this piece has an opening lined with tiny, deep, emerald green, sparkling dioptase crystals. An old F. Cureton & Sons label accompanies the specimen. Unusual location. Displays perfectly!
PyromorphiteSecondary Minerals, Various Locations
  • Item #12872
  • Pyromorphite
  • 9.3x7.0x6.5 cm
  • Largest Crystal Size: 12mm
  • $60.00
  • Ems

  • Germany
  • A few brownish pyromorphite crystals are scattered on the top of this sandstone matrix. Most of the crystals are damaged, however. I've put it on the site since it is a unique, classic locality. Looks good, regardless!
ParatacamiteSecondary Minerals, Various Locations
  • Item #13373
  • Paratacamite
  • 8.6x4.4x2.0 cm
  • Largest Crystal Size: 1mm
  • $55.00
  • San Francisco Mine
  • Sierra Gorda
    Chile
  • Excellent, sharp, dark green crystals of paratacamite are scattered, in clusters, across the top of this specimen. Excellent!
ParatacamiteSecondary Minerals, Various Locations
  • Item #13372
  • Paratacamite
  • 4.8x4.7x4.6 cm
  • Largest Crystal Size: micro
  • $30.00
  • San Francisco Mine
  • Sierra Gorda
    Chile
  • Sharp, dark green paratacamite crystals are scattered down the center of this specimen.
PyromorphiteSecondary Minerals, Various Locations
  • Item #13400
  • Pyromorphite
  • 3.7x3.3x1.8 cm
  • Largest Crystal Size: 14mm
  • $35.00
  • Broken Hill Mine
  • New South Wales
    Australia
  • A cluster of unusual gray-coloured, elongated, interlocking pyromorphite crystals from the deposit that spawned the largest mining company in the world!
CornetiteSecondary Minerals, Various Locations
  • Item #13385
  • Cornetite
  • 5.3x4.2x1.8 cm
  • Largest Crystal Size: micro
  • $35.00
  • Manto Russo Mine
  • Salado
    Chile
  • Lots of cavities in this copper-rich gossan are lined with deep-blue cornetite crystals.
MalachiteSecondary Minerals, Various Locations
  • Item #14414
  • Malachite
  • 10.5x8.0x6.5 cm
  • Largest Crystal Size: 2mm
  • $65.00
  • Etoile de Congo Mine
  • Katanga
    Democratic Republic of Congo
  • This specimen is kind of a hollow geode of deep green malachite embedded in a lighter coloured matrix. The interior of the geode is lined with small, sparkling crystals of malachite and they are set on a rind of solid malachite about 5mm thick. Great looking specimen from a classic locality.
MalachiteSecondary Minerals, Various Locations
  • Item #14957
  • Malachite
  • 4.3x3.0x3.1 cm
  • Largest Crystal Size: n/a
  • $35.00
  • Lornex Mine (Highland Valley Copper)
  • Logan Lake
    British Columbia, Canada
  • All of the open spaces in this quartz breccia are lined with dark green botryoidal malachite. This is a HUGE copper-molybdenum mine in the Highland Valley of British Columbia that was formed by the amalgamation of Valley Copper Mine, Highmont Mine and Lornex Mine. When they mine the near surface portions of the deposit, they sometimes encounter secondary mineralization.
WulfeniteSecondary Minerals, Various Locations
  • Item #16916
  • Wulfenite
  • 7.8x5.7x3.2 cm
  • Largest Crystal Size: 12mm
  • $150.00
  • Rowley Mine
  • Maricopa County
    Arizona, USA
  • A superb cluster of lustrous wulfenite crystals from an old Arizona classic locality. The specimen shows tabular, beveled wulfenite crystals ranging in colour from fairly yellow to brownish. The wulfenites have formed on, what looks like, a bed of small botryoidal mimetite crystals. Displays very well From front!
Azurite, QuartzSecondary Minerals, Various Locations
  • Item #19353
  • Azurite, Quartz
  • 9.7x4.0x5.5 cm
  • Largest Crystal Size: n/a
  • $45.00
  • Pui Pui
    New Zealand
  • This is an unusual specimen from a location that probably has very little documented about it! A friend collected it near Pui Pui. The nodules appear to be formed from interlocking quartz crystals and copper secondary minerals, particularly azurite and malachite. No analyses have been done. Interesting!
Goethite, ps AnglesiteSecondary Minerals, Various Locations
  • Item #20012
  • Goethite, ps Anglesite
  • 4.4x3.7x2.7 cm
  • Largest Crystal Size: 14mm
  • $85.00
  • Kintore Open Cut
  • Broken Hill, NSW
    Australia
  • This is an unusual one!! This specimen shows dark brown, velvety casts of goethite after anglesite, loyally preserving the shape of the anglesite crystals. Interestingly, the casts are often partially full of much smaller blades of colourless to white cerussite. Displays well. Excellent!
NadoriteSecondary Minerals, Various Locations
  • Item #20166
  • Nadorite
  • 6.24.6x4.3 cm
  • Largest Crystal Size: n/a
  • $80.00
  • Djebel Nador
  • Guelma
    Constantine, Canada
  • This specimen consists mostly of massive andorite with some cavities that have sharp, bladed andorite crystals in them. It is not a great specimen but it is a good specimen of this rare mineral and from the type locality.